s 128 Renunciation of citizenship
128.—(1) Any citizen of Singapore of or over the age of 21 years and of sound mind who is also or is about to become a citizen of another country may renounce his citizenship of Singapore by declaration registered by the Government, and shall upon such registration cease to be a citizen of Singapore. (2) The Government may withhold the registration of a declaration under this Article —(a) if the declaration is made during any war in which Singapore is engaged; or (b) if the declaration is made by a person subject to the Enlistment Act 1970 unless he has —(i) discharged his liability for full‑time service under section 12 of that Act; (ii) rendered at least 3 years of operationally ready national service under section 13 of that Act in lieu of such full‑time service; or (iii) complied with such conditions as may be determined by the Government. (3) This Article applies to a woman under the age of 21 years who has been married as it applies to a person of or over that age.